[ 29.521284] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 30.304063] random: sshd: uninitialized urandom read (32 bytes read) [ 30.598919] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.133478] random: sshd: uninitialized urandom read (32 bytes read) [ 255.127822] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.205' (ECDSA) to the list of known hosts. [ 260.590153] random: sshd: uninitialized urandom read (32 bytes read) [ 260.716928] kauditd_printk_skb: 10 callbacks suppressed [ 260.716937] audit: type=1400 audit(1567935322.165:36): avc: denied { map } for pid=6878 comm="syz-executor859" path="/root/syz-executor859321410" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 260.951147] IPVS: ftp: loaded support on port[0] = 21 [ 261.769802] chnl_net:caif_netlink_parms(): no params data found [ 261.800462] bridge0: port 1(bridge_slave_0) entered blocking state [ 261.807509] bridge0: port 1(bridge_slave_0) entered disabled state [ 261.815053] device bridge_slave_0 entered promiscuous mode [ 261.822606] bridge0: port 2(bridge_slave_1) entered blocking state [ 261.829289] bridge0: port 2(bridge_slave_1) entered disabled state [ 261.836934] device bridge_slave_1 entered promiscuous mode [ 261.855967] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 261.865309] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 261.881533] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 261.889030] team0: Port device team_slave_0 added [ 261.894584] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 261.901682] team0: Port device team_slave_1 added [ 261.907067] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 261.914448] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 261.982305] device hsr_slave_0 entered promiscuous mode [ 262.050325] device hsr_slave_1 entered promiscuous mode [ 262.110562] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 262.117963] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 262.131334] bridge0: port 2(bridge_slave_1) entered blocking state [ 262.137913] bridge0: port 2(bridge_slave_1) entered forwarding state [ 262.145268] bridge0: port 1(bridge_slave_0) entered blocking state [ 262.151953] bridge0: port 1(bridge_slave_0) entered forwarding state [ 262.179828] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 262.186984] 8021q: adding VLAN 0 to HW filter on device bond0 [ 262.195248] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 262.204126] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 262.223300] bridge0: port 1(bridge_slave_0) entered disabled state [ 262.230887] bridge0: port 2(bridge_slave_1) entered disabled state [ 262.240539] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 262.246819] 8021q: adding VLAN 0 to HW filter on device team0 [ 262.255487] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 262.263439] bridge0: port 1(bridge_slave_0) entered blocking state [ 262.269969] bridge0: port 1(bridge_slave_0) entered forwarding state [ 262.289354] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 262.299267] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 262.310677] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 262.318518] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 262.326674] bridge0: port 2(bridge_slave_1) entered blocking state [ 262.333943] bridge0: port 2(bridge_slave_1) entered forwarding state [ 262.342773] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 262.351328] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 262.358877] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 262.366734] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 262.374730] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 262.381937] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 262.394486] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 262.404846] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 367.470025] INFO: rcu_sched self-detected stall on CPU [ 367.470034] INFO: rcu_preempt self-detected stall on CPU [ 367.477464] 1-...: (10499 ticks this GP) idle=8ba/140000000000001/0 softirq=11140/11142 fqs=0 [ 367.477484] 0-...: (10499 ticks this GP) idle=99e/140000000000001/0 softirq=9763/9763 fqs=0 [ 367.483092] [ 367.493796] [ 367.503785] (t=10500 jiffies g=751 c=750 q=10) [ 367.505716] (t=10500 jiffies g=1114 c=1113 q=229) [ 367.507426] rcu_sched kthread starved for 10500 jiffies! g751 c750 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 [ 367.512731] rcu_preempt kthread starved for 10500 jiffies! g1114 c1113 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 [ 367.512737] rcu_preempt I [ 367.517981] rcu_sched I [ 367.529325] 29824 8 2 0x80000000 [ 367.541601] 29824 9 2 0x80000000 [ 367.545220] Call Trace: [ 367.548932] Call Trace: [ 367.553681] __schedule+0x7b8/0x1cd0 [ 367.559521] __schedule+0x7b8/0x1cd0 [ 367.562514] ? pci_mmcfg_check_reserved+0x150/0x150 [ 367.565592] ? pci_mmcfg_check_reserved+0x150/0x150 [ 367.569793] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 367.569806] schedule+0x92/0x1c0 [ 367.574047] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 367.580093] schedule_timeout+0x43e/0xe10 [ 367.585719] schedule+0x92/0x1c0 [ 367.590908] ? usleep_range+0x130/0x130 [ 367.594491] schedule_timeout+0x43e/0xe10 [ 367.599788] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 367.604422] ? usleep_range+0x130/0x130 [ 367.608194] ? prepare_to_swait+0xcc/0x100 [ 367.612275] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 367.616507] ? call_timer_fn+0x670/0x670 [ 367.621880] ? prepare_to_swait+0xcc/0x100 [ 367.626467] rcu_gp_kthread+0xbf4/0x1ec0 [ 367.631466] ? call_timer_fn+0x670/0x670 [ 367.637063] ? force_qs_rnp+0x4d0/0x4d0 [ 367.641459] rcu_gp_kthread+0xbf4/0x1ec0 [ 367.646527] kthread+0x319/0x430 [ 367.651027] ? force_qs_rnp+0x4d0/0x4d0 [ 367.655446] ? force_qs_rnp+0x4d0/0x4d0 [ 367.660213] kthread+0x319/0x430 [ 367.664844] ? kthread_create_on_node+0xd0/0xd0 [ 367.668598] ? force_qs_rnp+0x4d0/0x4d0 [ 367.672654] ret_from_fork+0x24/0x30 [ 367.677059] ? kthread_create_on_node+0xd0/0xd0 [ 367.677069] ret_from_fork+0x24/0x30 [ 367.682446] NMI backtrace for cpu 0 [ 367.711140] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.14.142 #0 [ 367.718613] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 367.729437] Call Trace: [ 367.732287] [ 367.734776] dump_stack+0x138/0x197 [ 367.738585] nmi_cpu_backtrace.cold+0x57/0x94 [ 367.743703] ? irq_force_complete_move.cold+0x7d/0x7d [ 367.750564] nmi_trigger_cpumask_backtrace+0x141/0x189 [ 367.756784] arch_trigger_cpumask_backtrace+0x14/0x20 [ 367.762727] rcu_dump_cpu_stacks+0x186/0x1d2 [ 367.767685] rcu_check_callbacks.cold+0x43d/0xd0a [ 367.773217] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 367.779735] update_process_times+0x31/0x70 [ 367.784342] tick_sched_handle+0x85/0x160 [ 367.788698] tick_sched_timer+0x43/0x130 [ 367.793816] __hrtimer_run_queues+0x270/0xbc0 [ 367.798886] ? tick_sched_do_timer+0xe0/0xe0 [ 367.803303] ? hrtimer_start_range_ns+0x10d0/0x10d0 [ 367.809631] hrtimer_interrupt+0x1d8/0x5d0 [ 367.815470] smp_apic_timer_interrupt+0x11c/0x5e0 [ 367.820319] apic_timer_interrupt+0x96/0xa0 [ 367.824988] [ 367.827335] RIP: 0010:__list_add_valid+0x10/0xa0 [ 367.832792] RSP: 0018:ffff8880a9ceebf8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 367.844101] RAX: dffffc0000000000 RBX: ffff88809fe07878 RCX: 0000000000000000 [ 367.852044] RDX: ffff88809fe07910 RSI: ffff88809fe07910 RDI: ffff88809fe07878 [ 367.861053] RBP: ffff8880a9ceec00 R08: 0000000000000000 R09: ffff8880a9ce2b50 [ 367.869795] R10: ffff8880a9ce2b30 R11: ffff8880a9ce21c0 R12: dffffc0000000000 [ 367.878850] R13: ffff88809fe07680 R14: ffff88809fe07910 R15: ffff88809fe07900 [ 367.887121] hhf_dequeue+0x61b/0xa60 [ 367.891891] __qdisc_run+0x2b8/0xe00 [ 367.896557] __dev_queue_xmit+0x1571/0x25e0 [ 367.901345] ? br_nf_pre_routing+0xdce/0x12c7 [ 367.906476] ? nf_hook_slow+0xaf/0x1b0 [ 367.910832] ? br_handle_frame+0x80c/0x1110 [ 367.915953] ? __netif_receive_skb_core+0x789/0x2ca0 [ 367.921862] ? netdev_pick_tx+0x300/0x300 [ 367.927202] ? save_trace+0x290/0x290 [ 367.931120] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 367.937343] ? __lock_is_held+0xb6/0x140 [ 367.942179] ? check_preemption_disabled+0x3c/0x250 [ 367.947736] dev_queue_xmit+0x18/0x20 [ 367.952310] ? dev_queue_xmit+0x18/0x20 [ 367.957279] br_dev_queue_push_xmit+0x367/0x530 [ 367.962463] ? trace_hardirqs_on+0xd/0x10 [ 367.966918] br_nf_dev_queue_xmit+0x307/0x1440 [ 367.971937] ? lock_downgrade+0x6e0/0x6e0 [ 367.976305] br_nf_post_routing+0xb80/0xf00 [ 367.980799] ? br_nf_dev_queue_xmit+0x1440/0x1440 [ 367.986029] ? ipv6_skip_exthdr+0x430/0x4d0 [ 367.990925] ? br_nf_pre_routing_finish_bridge+0x9f0/0x9f0 [ 367.996882] nf_hook_slow+0xaf/0x1b0 [ 368.001189] br_forward_finish+0x1b7/0x320 [ 368.006290] ? br_dev_queue_push_xmit+0x530/0x530 [ 368.013362] ? __lock_is_held+0xb6/0x140 [ 368.017823] ? check_preemption_disabled+0x3c/0x250 [ 368.023964] ? br_fdb_add.cold+0x84/0x84 [ 368.028369] ? nf_hook_slow+0xcc/0x1b0 [ 368.032386] br_nf_hook_thresh+0x25b/0x2e0 [ 368.036947] ? save_trace+0x290/0x290 [ 368.041139] ? setup_pre_routing+0x410/0x410 [ 368.047403] ? find_held_lock+0x35/0x130 [ 368.051879] ? br_dev_queue_push_xmit+0x530/0x530 [ 368.057008] br_nf_forward_finish+0x264/0x640 [ 368.061969] ? br_dev_queue_push_xmit+0x530/0x530 [ 368.067782] br_nf_forward_ip+0x5fc/0x11d0 [ 368.073605] ? br_nf_forward_finish+0x640/0x640 [ 368.079108] ? br_handle_vlan+0x4ea/0xab0 [ 368.084441] ? br_nf_hook_thresh+0x2e0/0x2e0 [ 368.089550] nf_hook_slow+0xaf/0x1b0 [ 368.094801] __br_forward+0x312/0x9c0 [ 368.100131] ? br_forward_finish+0x320/0x320 [ 368.105117] ? br_dev_queue_push_xmit+0x530/0x530 [ 368.110353] deliver_clone+0x61/0xc0 [ 368.114383] br_flood+0x43c/0x530 [ 368.118475] br_handle_frame_finish+0xaf0/0x1830 [ 368.123675] ? save_trace+0x290/0x290 [ 368.128484] ? br_handle_local_finish+0x20/0x20 [ 368.133806] ? nf_hook_slow+0xcc/0x1b0 [ 368.138323] br_nf_hook_thresh+0x25b/0x2e0 [ 368.143093] ? setup_pre_routing+0x410/0x410 [ 368.148153] ? __lock_is_held+0xb6/0x140 [ 368.155319] ? br_handle_local_finish+0x20/0x20 [ 368.161384] br_nf_pre_routing_finish_ipv6+0x621/0xc50 [ 368.168649] ? br_handle_local_finish+0x20/0x20 [ 368.173630] ? lock_downgrade+0x6e0/0x6e0 [ 368.178672] br_nf_pre_routing_ipv6+0x417/0x790 [ 368.184166] ? br_validate_ipv6+0xa00/0xa00 [ 368.188902] ? __lock_is_held+0xb6/0x140 [ 368.193181] ? brnf_device_event.cold+0x29/0x29 [ 368.198133] ? skb_pull_rcsum+0x130/0x2c0 [ 368.202640] br_nf_pre_routing+0xdce/0x12c7 [ 368.207066] ? br_nf_pre_routing_finish+0x15b0/0x15b0 [ 368.212783] nf_hook_slow+0xaf/0x1b0 [ 368.216935] br_handle_frame+0x80c/0x1110 [ 368.221084] ? br_handle_frame_finish+0x1830/0x1830 [ 368.226513] ? __lock_is_held+0xb6/0x140 [ 368.230666] ? check_preemption_disabled+0x3c/0x250 [ 368.236576] ? br_handle_local_finish+0x20/0x20 [ 368.241776] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 368.247224] ? br_handle_frame_finish+0x1830/0x1830 [ 368.252692] __netif_receive_skb_core+0x789/0x2ca0 [ 368.258284] ? trace_hardirqs_on+0x10/0x10 [ 368.262936] ? enqueue_to_backlog+0xcc0/0xcc0 [ 368.267686] ? process_backlog+0x43e/0x730 [ 368.272514] ? find_held_lock+0x35/0x130 [ 368.277238] ? process_backlog+0x43e/0x730 [ 368.282460] ? lock_acquire+0x16f/0x430 [ 368.286526] __netif_receive_skb+0x2c/0x1b0 [ 368.290932] ? __netif_receive_skb+0x2c/0x1b0 [ 368.296029] process_backlog+0x21f/0x730 [ 368.300452] ? finish_task_switch+0x178/0x650 [ 368.305537] net_rx_action+0x490/0xf80 [ 368.309914] ? tasklet_action+0x510/0x510 [ 368.314758] ? napi_complete_done+0x4f0/0x4f0 [ 368.319438] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 368.325232] __do_softirq+0x244/0x9a0 [ 368.329518] ? pci_mmcfg_check_reserved+0x150/0x150 [ 368.335263] ? tasklet_action+0x510/0x510 [ 368.340578] run_ksoftirqd+0x8c/0x1b0 [ 368.345061] smpboot_thread_fn+0x5f4/0x960 [ 368.350444] ? __kthread_parkme+0x117/0x1c0 [ 368.357961] ? sort_range+0x30/0x30 [ 368.362235] kthread+0x319/0x430 [ 368.365603] ? sort_range+0x30/0x30 [ 368.369301] ? kthread_create_on_node+0xd0/0xd0 [ 368.375847] ret_from_fork+0x24/0x30 [ 368.380435] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 368.386656] 0-...: (10500 ticks this GP) idle=99e/140000000000000/0 softirq=9763/9763 fqs=0 [ 368.395404] (detected by 1, t=10521 jiffies, g=1114, c=1113, q=229) [ 368.402168] Sending NMI from CPU 1 to CPUs 0: [ 368.407507] NMI backtrace for cpu 0 [ 368.407511] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.14.142 #0 [ 368.407514] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 368.407517] task: ffff8880a9ce21c0 task.stack: ffff8880a9ce8000 [ 368.407519] RIP: 0010:hhf_dequeue+0x54f/0xa60 [ 368.407521] RSP: 0018:ffff8880a9ceec10 EFLAGS: 00000a07 [ 368.407526] RAX: 0000000000000000 RBX: ffff88809fe07878 RCX: 0000000000000000 [ 368.407528] RDX: 1ffff11013fc0f12 RSI: ffff88809fe07910 RDI: ffff88809fe07894 [ 368.407531] RBP: ffff8880a9ceec60 R08: 0000000000000000 R09: ffff8880a9ce2b50 [ 368.407534] R10: ffff8880a9ce2b30 R11: ffff8880a9ce21c0 R12: dffffc0000000000 [ 368.407537] R13: ffff88809fe07680 R14: 0000000000000002 R15: ffff88809fe07900 [ 368.407540] FS: 0000000000000000(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 368.407542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 368.407545] CR2: 00000000006dab10 CR3: 000000000766a000 CR4: 00000000001406f0 [ 368.407548] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 368.407550] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 368.407552] Call Trace: [ 368.407554] __qdisc_run+0x2b8/0xe00 [ 368.407556] __dev_queue_xmit+0x1571/0x25e0 [ 368.407558] ? br_nf_pre_routing+0xdce/0x12c7 [ 368.407560] ? nf_hook_slow+0xaf/0x1b0 [ 368.407562] ? br_handle_frame+0x80c/0x1110 [ 368.407564] ? __netif_receive_skb_core+0x789/0x2ca0 [ 368.407566] ? netdev_pick_tx+0x300/0x300 [ 368.407568] ? save_trace+0x290/0x290 [ 368.407570] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 368.407572] ? __lock_is_held+0xb6/0x140 [ 368.407574] ? check_preemption_disabled+0x3c/0x250 [ 368.407576] dev_queue_xmit+0x18/0x20 [ 368.407578] ? dev_queue_xmit+0x18/0x20 [ 368.407580] br_dev_queue_push_xmit+0x367/0x530 [ 368.407582] ? trace_hardirqs_on+0xd/0x10 [ 368.407584] br_nf_dev_queue_xmit+0x307/0x1440 [ 368.407586] ? lock_downgrade+0x6e0/0x6e0 [ 368.407588] br_nf_post_routing+0xb80/0xf00 [ 368.407590] ? br_nf_dev_queue_xmit+0x1440/0x1440 [ 368.407592] ? ipv6_skip_exthdr+0x430/0x4d0 [ 368.407595] ? br_nf_pre_routing_finish_bridge+0x9f0/0x9f0 [ 368.407597] nf_hook_slow+0xaf/0x1b0 [ 368.407598] br_forward_finish+0x1b7/0x320 [ 368.407601] ? br_dev_queue_push_xmit+0x530/0x530 [ 368.407602] ? __lock_is_held+0xb6/0x140 [ 368.407605] ? check_preemption_disabled+0x3c/0x250 [ 368.407606] ? br_fdb_add.cold+0x84/0x84 [ 368.407608] ? nf_hook_slow+0xcc/0x1b0 [ 368.407610] br_nf_hook_thresh+0x25b/0x2e0 [ 368.407612] ? save_trace+0x290/0x290 [ 368.407614] ? setup_pre_routing+0x410/0x410 [ 368.407616] ? find_held_lock+0x35/0x130 [ 368.407618] ? br_dev_queue_push_xmit+0x530/0x530 [ 368.407620] br_nf_forward_finish+0x264/0x640 [ 368.407622] ? br_dev_queue_push_xmit+0x530/0x530 [ 368.407624] br_nf_forward_ip+0x5fc/0x11d0 [ 368.407626] ? br_nf_forward_finish+0x640/0x640 [ 368.407628] ? br_handle_vlan+0x4ea/0xab0 [ 368.407630] ? br_nf_hook_thresh+0x2e0/0x2e0 [ 368.407632] nf_hook_slow+0xaf/0x1b0 [ 368.407634] __br_forward+0x312/0x9c0 [ 368.407636] ? br_forward_finish+0x320/0x320 [ 368.407638] ? br_dev_queue_push_xmit+0x530/0x530 [ 368.407640] deliver_clone+0x61/0xc0 [ 368.407642] br_flood+0x43c/0x530 [ 368.407644] br_handle_frame_finish+0xaf0/0x1830 [ 368.407646] ? save_trace+0x290/0x290 [ 368.407648] ? br_handle_local_finish+0x20/0x20 [ 368.407650] ? nf_hook_slow+0xcc/0x1b0 [ 368.407652] br_nf_hook_thresh+0x25b/0x2e0 [ 368.407654] ? setup_pre_routing+0x410/0x410 [ 368.407656] ? __lock_is_held+0xb6/0x140 [ 368.407658] ? br_handle_local_finish+0x20/0x20 [ 368.407660] br_nf_pre_routing_finish_ipv6+0x621/0xc50 [ 368.407662] ? br_handle_local_finish+0x20/0x20 [ 368.407664] ? lock_downgrade+0x6e0/0x6e0 [ 368.407666] br_nf_pre_routing_ipv6+0x417/0x790 [ 368.407669] ? br_validate_ipv6+0xa00/0xa00 [ 368.407671] ? __lock_is_held+0xb6/0x140 [ 368.407673] ? brnf_device_event.cold+0x29/0x29 [ 368.407675] ? skb_pull_rcsum+0x130/0x2c0 [ 368.407677] br_nf_pre_routing+0xdce/0x12c7 [ 368.407679] ? br_nf_pre_routing_finish+0x15b0/0x15b0 [ 368.407681] nf_hook_slow+0xaf/0x1b0 [ 368.407683] br_handle_frame+0x80c/0x1110 [ 368.407685] ? br_handle_frame_finish+0x1830/0x1830 [ 368.407687] ? __lock_is_held+0xb6/0x140 [ 368.407689] ? check_preemption_disabled+0x3c/0x250 [ 368.407691] ? br_handle_local_finish+0x20/0x20 [ 368.407693] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 368.407695] ? br_handle_frame_finish+0x1830/0x1830 [ 368.407697] __netif_receive_skb_core+0x789/0x2ca0 [ 368.407699] ? trace_hardirqs_on+0x10/0x10 [ 368.407701] ? enqueue_to_backlog+0xcc0/0xcc0 [ 368.407703] ? process_backlog+0x43e/0x730 [ 368.407705] ? find_held_lock+0x35/0x130 [ 368.407707] ? process_backlog+0x43e/0x730 [ 368.407709] ? lock_acquire+0x16f/0x430 [ 368.407711] __netif_receive_skb+0x2c/0x1b0 [ 368.407713] ? __netif_receive_skb+0x2c/0x1b0 [ 368.407715] process_backlog+0x21f/0x730 [ 368.407717] ? finish_task_switch+0x178/0x650 [ 368.407719] net_rx_action+0x490/0xf80 [ 368.407721] ? tasklet_action+0x510/0x510 [ 368.407723] ? napi_complete_done+0x4f0/0x4f0 [ 368.407725] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 368.407727] __do_softirq+0x244/0x9a0 [ 368.407730] ? pci_mmcfg_check_reserved+0x150/0x150 [ 368.407731] ? tasklet_action+0x510/0x510 [ 368.407733] run_ksoftirqd+0x8c/0x1b0 [ 368.407735] smpboot_thread_fn+0x5f4/0x960 [ 368.407737] ? __kthread_parkme+0x117/0x1c0 [ 368.407739] ? sort_range+0x30/0x30 [ 368.407741] kthread+0x319/0x430 [ 368.407743] ? sort_range+0x30/0x30 [ 368.407745] ? kthread_create_on_node+0xd0/0xd0 [ 368.407747] ret_from_fork+0x24/0x30 [ 368.407748] Code: ca 7c 08 84 c9 0f 85 d1 03 00 00 45 8b b5 ac 02 00 00 89 45 b8 e8 02 51 6d fc 49 8d bd 14 02 00 00 8b 45 b8 48 89 fa 48 c1 ea 03 <42> 0f b6 0c 22 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f [ 368.407825] rcu_preempt kthread starved for 10521 jiffies! g1114 c1113 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 [ 368.997791] rcu_preempt R running task 29824 8 2 0x80000000 [ 369.005311] Call Trace: [ 369.007905] __schedule+0x7b8/0x1cd0 [ 369.011713] ? pci_mmcfg_check_reserved+0x150/0x150 [ 369.016721] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 369.021821] schedule+0x92/0x1c0 [ 369.025197] schedule_timeout+0x43e/0xe10 [ 369.029345] ? usleep_range+0x130/0x130 [ 369.033313] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 369.038427] ? prepare_to_swait+0xcc/0x100 [ 369.042663] ? call_timer_fn+0x670/0x670 [ 369.046748] rcu_gp_kthread+0xbf4/0x1ec0 [ 369.050818] ? force_qs_rnp+0x4d0/0x4d0 [ 369.054794] kthread+0x319/0x430 [ 369.058242] ? force_qs_rnp+0x4d0/0x4d0 [ 369.062212] ? kthread_create_on_node+0xd0/0xd0 [ 369.067151] ret_from_fork+0x24/0x30